CVE-2024-42100: clk: sunxi-ng: common: Don't call hw_to_ccu_common on hw without common

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-30 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: clk: sunxi-ng: common: Don't call hw_to_ccu_common on hw without common In order to set the rate range of a hw sunxi_ccu_probe calls hw_to_ccu_common() assuming all entries in desc->ccu_clks are contained in a ccu_common struct. This assumption is incorrect and, in consequence, causes invalid pointer de-references. Remove the faulty call. Instead, add one more loop that iterates over the ccu_clks and sets the rate range, if required.

Affected products

Linux kernel: from 6.6.31 before 6.6.39; from 6.8.10 before 6.9; from 6.9.1 before 6.9.9; 6.9, 6.9-rc7, 6.10-rc1, 6.10-rc2, 6.10-rc3, 6.10-rc4 (+2) — fixed in 6.6.39, 6.9, 6.9.9

How to fix

Upgrade to a fixed version: Linux kernel 6.6.39, 6.9, 6.9.9. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2024-42100 or the next vulnerability affects your stack